PRELIMINARY SITE SELECTION – CHILEAN MARINE ENERGY RESOURCES Client Inter-American Development Bank Contact Juan Paredes Document No 100513/BR/02 Issue B Classification Published Date 15 May 2009 Author: J Cruz, M D Thomson, E Stavroulia Checked by: R I Rawlinson-Smith Approved by: R I Rawlinson-Smith IMPORTANT NOTICE AND DISCLAIMER 1. This report is intended for the use of the Client on whose instructions it has been prepared, and who has entered into a written agreement directly with Garrad Hassan & Partners Limited (“GH”). GH’s liability to the Client is set out in that agreement. GH shall have no liability to third parties for any use whatsoever without the express written authority of GH. The report may only be reproduced and circulated in accordance with the Document Classification and associated conditions stipulated in this report, and may not be disclosed in any public offering memorandum without the express written consent of GH. 2. This report has been produced from information relating to dates and periods referred to in this report. The report does not imply that any information is not subject to change. Key To Document Classification Strictly Confidential : Recipients only Private and Confidential : For disclosure to individuals directly concerned within the recipient’s organisation Commercial in Confidence : Not to be disclosed outside the recipient’s organisation GHP only : Not to be disclosed to non GHP staff Client’s Discretion : Distribution at the discretion of the client subject to contractual agreement Published : Available to the general public © 2009 Garrad Hassan and Partners Limited www.garradhassan.com Garrad Hassan and Partners Ltd Document: 100513/BR/02 Issue: B FINAL Revision History Issue Issue Summary Date: A 20/02/09 Original release for clients review B 15/05/09 Final release i Garrad Hassan and Partners Ltd Document: 100513/BR/02 Issue: B FINAL CONTENTS Page EXECUTIVE SUMMARY 1 1 INTRODUCTION 6 2 WAVE ENERGY: ZONE SELECTION 8 2.1 Methodology 8 2.1.1 Background 8 2.1.2 Application to Chile 10 2.2 Sources of data 13 2.3 Results 14 3 TIDAL ENERGY ZONE SELECTION 27 3.1 Methodology 27 3.1.1 Resource assessment in Chile 27 3.1.2 Constraints mapping and zone selection 28 3.1.3 Annual energy calculation methodology 30 3.2 Source of data 31 3.2.1 SHOA presentation 31 3.2.2 SHOA tide tables 33 3.2.3 SHOA charts 33 3.2.4 Published literature 34 3.2.5 Numerical model data 35 3.3 Results 37 3.3.1 Resource 37 3.3.2 Review of constraints 38 3.3.3 Identification of the three most promising areas for tidal stream project developments 45 ACKNOWLEDGEMENTS 50 REFERENCES 50 APPENDIX A WAVE 53 APPENDIX B TIDAL 57 ii Garrad Hassan and Partners Ltd Document: 100513/BR/02 Issue: B FINAL List of Tables Table 2-1 Sources of Data for the wave energy zone selection exercise................................................14 Table 2-2 Priority locations for the development of wave energy projects and.....................................17 Table 3-1 Identified areas of good tidal resource...................................................................................38 Table 3-2 Typical depths at the identified areas.....................................................................................39 Table 3-3 Location Typical depths at the identified areas......................................................................40 Table 3-4 Distance to the nearest port for the identified areas...............................................................42 Table 3-5 Fishing and navigation issues at the identified areas .............................................................43 Table 3-6 Fishing concession details......................................................................................................43 Table 3-7 Ecological issues near or at the identified areas.....................................................................45 Table 3-8 Location Typical depths at the identified areas......................................................................45 Table 3-9 Result of zone ranking ...........................................................................................................46 Table 3-10 Energy estimate for the three top zones ...............................................................................47 List of Figures Figure 2-1 Example of a site selection exercise using a quantitative approach (Nobre et al., 2009) .....10 Figure 2-2 Overall classification – weighted average ............................................................................19 Figure 2-3 Reclassification of distance to electricity grid ......................................................................20 Figure 2-4 Reclassification of distance to port.......................................................................................21 Figure 2-5 Reclassification of seabed sediment thickness (geology).....................................................22 Figure 2-6 Reclassification of wave power ............................................................................................23 Figure 3-1 SHOA presentation – measurements in the Chilean Inland Sea...........................................32 Figure 3-2 SHOA presentation – tidal measurements ............................................................................32 Figure 3-3 SHOA presentation – potential tidal areas............................................................................33 Figure 3-4 Potential tidal resource in Southern Chile ............................................................................33 Figure 3-5 Model area of the Chilean Inland Sea (source: [3.10]).........................................................36 Figure 3-6 Concurrent water level elevations in the Chilean Inland Sea (source: [3.19]) .....................37 Figure 3-7 Potential tidal resource (peak spring currents) in the Chilean Inland Sea (source: [3.19]) ..37 Figure 3-8 Electrical grid in Region X and XI. ......................................................................................39 Figure 3-9 Electrical grid in Region XII ................................................................................................40 Figure 3-10 Port proximities in Region X and XI..................................................................................41 Figure 3-11 Port proximities in Region XII ...........................................................................................41 Figure 3-12 Fishing concession in and around the Chilean Inland Sea..................................................42 Figure 3-13 Environmental issues in and around the Chilean Inland Sea..............................................44 Figure 3-14 Environmental issues in Region XII...................................................................................44 Figure 3-15 Map of the Chacao channel, source [3.11] .........................................................................48 Figure 3-16 SHOA chart of the Chacao channel, source [3.12].............................................................48 Figure 3-17 SHOA web chart of the Chacao channel source [3.5] including GIS database of Grid, ports and fishing concessions..........................................................................................................................48 Figure 3-18 Google earth image of the Chacao channel ........................................................................49 Figure 3-19 Narrowest section in the Chacao channel, source [3.11]....................................................49 Figure 3-20 ADCP transect results of M2 constituent at the narrowest section in the Chacao channel, source [3.11]...........................................................................................................................................49 iii Garrad Hassan and Partners Ltd Document: 100513/BR/02 Issue: B FINAL EXECUTIVE SUMMARY The Inter-American Development Bank (IADB) commissioned Garrad Hassan and Partners (GH) to undertake a preliminary marine energy resource assessment study of the Chilean coast. The GH approach comprised three stages: a. site visit to Chile – engagement with the key Chilean entities; b. review of marine energy resource and additional data; c. publication of guidelines and project design recommendations. Site Visit During the site visit entities which expressed an interest in this field and have a key role in the future development of marine energy projects in Chile were approached. The list includes, among others: Comisión Nacional de Energía (CNE); Corporación de Fomento de la Producción (CORFO); Ministry of Public Works; Ministry of Defence (DIRECTEMAR and Subsecretaria Marina); Servicio Hidrográfico y Oceanográfico de la Armada del Chile (SHOA); Comisión Nacional del Medio Ambiente (CONAMA); Academic institutions. The assessment focused on the wave and tidal stream energy resources and identified the most promising zones for marine renewable energy projects by creating a database which overlays the most relevant attributes and constraints, namely: Wave / tidal energy resource; Bathymetry; Access to the National electricity Grid; Seabed geology; Proximity to a commercial port (O&M base); Areas of economical interest (e.g. fisheries); Maritime concessions1; Areas of scientific interest; Special areas of conservation; Onshore (shoreline) designated areas; Other relevant information (e.g. seismic risk, archaeological sites, etc.). Two other constraints that are particularly restrictive